Introduction to Sundial Snails: Heliacus variegatus is commonly known in the aquarium hobby as a Sundial snail or box snail. These nocturnal snails are known Zoanthid predators. What a Sundial snail looks like:These snails are typically white and black, occasionally...

Introduction to Filamentous Hair Algae (Bryopsis):Bryopsis is a nuisance alga that can overgrow corals and live rock. It is generally dark green and filamentous. It is an indicator of high levels of nitrates and phosphates. Often, the nitrates and phosphates are not...

Introduction to Red Flatworms:Red Flatworms go by several different names; Convolutriloba retrogemma, red planaria, rust flatworms, and some refer to them as just flatworms. These terms are loosely used to describe flatworms that proliferate rapidly in aquariums with...

Introduction to Rapid Tissue Necrosis (RTN) and Slow Tissue Necrosis (STN): Tissue Necrosis and Slow Tissue Necrosis are used to describing an event of tissue coming off the coral or the coral turning white, which is known as bleaching. The speed at which this happens...

Introduction to Zoanthid Eating Nudibranchs:Zoanthid Eating Nudibranchs also are known as Zoa Eating Nudibranchs or Zoo Eating Nudibranchs are a type of aeolid nudibranchs which are known to feed on coral.It is important to keep these parasites out of our aquaria....